Question about Eazy lube axles

It's commonly considered a sales gimmick, and is an option from the axle manufacturer. The option gains the user nothing in terms of service interval, just knowing they have a zerk makes them happy.

IMHO it came to the RV world from the boat trailers with bearing buddies, which are useful.

Where does the old grease go? What is the bearing preload or end play? What shape are the bearings in?

It's also a common misconception that the wheel is to be spun during the process, yet it's not part of the manual procedures. Spinning the axle will compleatly fill the cavity, causing the bearings to run hot.

Check out the timken site on common failures, overpacking is on the list along with under packing and too much preload.

Dexter EZ Lube

Grease goes thru the port to the rear bearing, thru the rear bearing to the center of the hub, fills that area and then goes thru the outer bearing, and out the front. Takes a lot of grease (half a tube per wheel?), but that is the only way the outer bearing gets new grease to it. A few pumps does nothing for the outer bearing.

Word of caution. Some who have used it have pushed grease thru the inner grease seal and on to their brakes.

If you do it, use a manual grease gun, pump the grease very slowly while constantly turning the wheel (that makes the grease flow thru the inner bearing better and lessens the chance of over pressure on the seal), pump until you see new grease come out the front. I use a hi-temp red grease recommended by Dexter. The red makes it easier to see when new grease is coming out the front, indicating that most all the old grease has been pushed out. Check Dexter service manual for recommended greases.

AH64ID wrote:
As stated the grease goes to the inner bearing, and then the outer bearing thru heat and hub design.

Ez lube axles make it too easy to over grease the bearings, which can be as bad as under greased.

Many recommend ignoring the zerk fitting and just doing proper packing annually. Even my axle manual states that the ez lube fitting does nothing to extend the standard packing service interval.

That is funny, what is the point then. According to this video from Dexter, it is a "Complete repack".

Click here

As stated the grease goes to the inner bearing, and then the outer bearing thru heat and hub design.

Ez lube axles make it too easy to over grease the bearings, which can be as bad as under greased.

Many recommend ignoring the zerk fitting and just doing proper packing annually. Even my axle manual states that the ez lube fitting does nothing to extend the standard packing service interval.

coolbreeze01 wrote:
EZ Lubes are different than bearing buddies.
The grease flows to the rear bearing first.
I'm sure someone will post a diagram for you.

Wow, well that sure is "Ez" ;)

EZ Lubes are different than bearing buddies.
The grease flows to the rear bearing first.
I'm sure someone will post a diagram for you.